: what does it mean when people say' installed shift kit'

04-21-11, 08:52 PM
always wondered that..

i was looking at a 1970 coupe last fall, and in the ad stated it just had a tranny service with shift kit...

something readily availible and pretty common upgrade ?

i aint no mechanic !

04-21-11, 08:56 PM
A modification to valve-body in automatic transmission, usually to prolong transmission life, also changes how transmission shifts, firmer or smoother.

04-21-11, 09:32 PM
is this $20 part what all the 'hub hub' is all about ..lol


04-21-11, 10:55 PM
yep, or this one, maybe it's the same, i don't know.

04-21-11, 11:33 PM

This is a shift kit. It has different springs,check balls, and ect for the valve-body. The plates make the fluid flow different.

04-22-11, 08:43 AM
The Cadillac and other GM cars have what is concidered a soft shift. The performance and heavy duty vehicles will have special application parts in their transmissions, i.e. larger clutch drums to hold more plates and discs, higher rated springs in the clutch packs, and a different power piston with heavier spring. These transmissions deliver a shift which is noticably more abrupt, "crisper" as advertized. This is designed to allow the torque converter take the load of the shift, rather than the plates and discs absorbing the transfer. The aftermarket took those special application parts and put them in a marketable kit for performance enthusiasts.

04-22-11, 02:19 PM
any u guys insist on doing this upgrade ?

or is that slow, ultra smooth slushy shift, is what caddies are all about !

04-22-11, 05:50 PM
I've never had a th 400 that shifted too soft for me. They usually shift pretty crisp imho. The th350's REALLY needed a shift kit.